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 (lə-grānj′, -gränj′, lä-gräNzh′), Comte Joseph Louis 1736-1813.
French mathematician and astronomer. He developed the calculus of variations (1755) and made a number of other contributions to the study of mechanics.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(French laɡrɑ̃ʒ)
(Biography) Comte Joseph Louis (ʒozɛf lwi). 1736–1813, French mathematician and astronomer, noted particularly for his work on harmonics, mechanics, and the calculus of variations
Lagrangian adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ləˈgreɪndʒ, -ˈgrɑndʒ, -ˈgrɑ̃ʒ)

Joseph Louis, Comte, 1736–1813, French mathematician and astronomer.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in classic literature ?
It's right mean that Fairfax and Mattingly had to go down to Lagrange on some low business yesterday, but they'll be back to-morrow.
Late in the evening a skirmishing party of the French and a skirmishing party of the Germans had met, by accident, near the little village of Lagrange, close to the German frontier.
Fortis Property Group, a New York City-based real estate operating and development company, announced the closing of an $87.5 million construction loan to finance the construction of its LaGrange Street residential development in Downtown Boston.
Roscosmos said the telescope, named Spektr-RG, was delivered into a parking orbit before a final burn Saturday that kicked the spacecraft out of Earth's orbit and on to its final destination: the L2 Lagrange point, according to the Associated Press (AP).
LAGRANGE Marcus & Millichap said it has sold a 23-unit apartment property in La Grange, according to Steven D.
Built as a studio, collector Pierre Lagrange's Edwardian apartment was once inhabited by artists Glyn Philpot and Vivian Forbes.
Auto Business News-April 25, 2019--Ivy Lane Corporation acquires LaGrange quick-lube location
M2 EQUITYBITES-April 25, 2019--Ivy Lane Corporation acquires LaGrange quick-lube location
Kris LaGrange, president of Ucomm Media Group, a labor-focused communications firm, said he buys single copies at a 7-Eleven along with energy drinks and some other purchases.
With respect to the quadratic example, I provide an additional idea relevant to step 3 and demonstrate the use of Lagrange's interpolation formula as an alternative method for completing step 4.